Just downloaded it, odd it's not been announced here.
General Changes:
Add documentation for Custom Drawables to the programmer’s guide.
Update Input sample to be compatible with the Tall Watch screen type.
Fix application icon overriding bug.
Fix out-of-memory error when allocating large objects (such as parsing large JSON responses).
Fix a bug in custom font generation where xoffset was incorrectly used to determine width versus position within the glyph itself.
Simulator Changes:
Add vívoactive HR device and update Tall Watch with final fonts, memory sizes and data-field parameters.
Reduce Simulator run-time system memory usage.
Known Issues:
If an Exception is thrown from a catch block, the finally block of the current try/catch/finally will not be executed.
The compiler is processing custom fonts in a way that allows for more data to be specified, but hand-made font files may display slightly different.